3 years ago

Solve this problem as quickly as you can

Mathematics

1 answer:

Oksi-84 [34.3K]3 years ago

7 0

What is the expression though?

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What is the coefficient of x in the equation? y=x+4

Olenka [21]

Answer:

Step-by-step explanation:

When a variable does not have a visible coeffecient then the coefficient is 1. (Double check to make sure I'm correct)

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3 years ago

**A rock dropped from a 100 foot tower.

mars1129 [50]

Answer:

2.83 s

Step-by-step explanation:

We are given that

$h(t)=-16t^2+10t+100$

When a rock reached the ground then h(t)=0

$-16t^2+10t+100=0$

$16t^2-10t-100=0$

Using quadratic formula

$x=\frac{-b\pm\sqrt{b^2-4ac}}{2a}$

$t=\frac{10\pm\sqrt{(-10)^2-4\times 16\times (-100)}}{2(16)}$

$t=\frac{10\pm\sqrt{100+6400}}{32}$

$t=\frac{10+\sqrt{6500}}{32}=2.83$

$t=\frac{10-\sqrt{6500}}{32}=-2.2$

Time cannot be negative .Therefore, negative value of t can not be possible.

Hence, the rock takes 2.83 sec to reach the ground.

8 0

3 years ago

It took Sharon 4 hours to drive to her grandmother's house. Her grandmother lives 140 miles from Sharon.

Vladimir [108]

Answer:

You're right its B or 35

Step-by-step explanation:

Just divide 140 by 4 u get 35

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2 years ago

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3x - 15 = 7 - 8x how do you solve this

Nikitich [7]

Answer:

X=2

Step-by-step explanation:

3x-15=7-8x

3x+8x=7+15

11x=22

x= $\frac{22}{11}$

x=2

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3 years ago

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Convert 16 cm/hr to m/min

jeyben [28]

0.00266666667 m / min.

7 0

3 years ago